Novel vortex electronic water pump for electric vehicle thermal management system

Abstract

The invention discloses a novel vortex electronic water pump for a thermal management system of an electric vehicle. The novel vortex electronic water pump comprises a pump body sub-component, a motor body sub-component and a water pump motor controller, the vortex pump shell, the vortex pump waterproof sleeve and the motor shell are connected and fixed through five screws; and mechanism assembly of the pump body sub-component and the motor body sub-component is completed. A water pump motor controller is connected and fixed in a cavity at the rear end of a motor shell through screws, then a three-phase power supply terminal connecting line and a power supply connector terminal connecting line of a confluence plate binding post are welded and fixed with a circuit board of the water pump motor controller, and a rear cover and the motor shell are screwed and fixed through four screws. The vortex electronic water pump has the working characteristics of large flow, high lift, low noise, safety and reliability, is an energy-saving and environment-friendly high-tech product, and is particularly suitable for an electric vehicle thermal management system with higher requirements on modularization, light weight and integration; the vortex electronic water pump is compact in structure, good in sealing performance, low in cost and easy to assemble and maintain.

Description

Technical Field

[0001] The invention belongs to the technical field of electric vehicle devices and accessories, and in particular relates to a novel vortex electronic water pump for a thermal management system of an electric vehicle. Background Art

[0002] With the rapid development of the new energy vehicle industry, especially the electric vehicle smart cockpit and power battery pack cooling system and the electric drive module cooling system, the dynamic response performance requirements of the electric vehicle thermal management system are getting higher and higher. The electronic water pump is a key component in the electric vehicle thermal management system, and its performance significantly affects the efficiency of the electric vehicle thermal management system. The vortex electronic water pump has the characteristics of large flow, high head, low noise, safe and reliable working. It is one of the devices of energy-saving, safe and environmentally friendly high-tech electric vehicle thermal management system; the vortex electronic water pump has a compact structure, is easy to assemble and maintain, and has good integration; the vortex electronic water pump is the best choice for electric vehicle thermal management systems for pure electric vehicles (EVs) and hybrid electric vehicles (HEVs).

[0003] For early electric water pumps, on the one hand, the traditional DC drive motor has high noise, low rated speed, low output power, low efficiency and high heat generation; on the other hand, the centrifugal pump head design is mostly used, which has a large space volume, which is not conducive to the development of electric vehicle thermal management system towards modularization, lightweight and integration. In the current technical application, the motor shaft, stator core and stator coil are integrally injection molded, and then the injection molded stator core is pressed into the motor housing by interference fit, and the motor rotor is connected to the water pump impeller to slide and rotate around the motor shaft. Since the coolant not only corrodes the motor rotor assembly, but also contains large particles of impurities, it is easy to cause abnormal wear of the motor rotor assembly, the motor speed attenuation increases, and the performance of the electric water pump is greatly reduced. In addition, the integral injection molded stator core is prone to slight cracks when the coil winding is deformed and vibrated by heat, causing coolant leakage to damage the coil winding, and ultimately leading to the overall failure of the electric water pump; the electric water pump parts have poor compatibility and high manufacturing costs. Therefore, how to provide a vortex electronic water pump that can be used for a long time, has a simple assembly process and lower cost, uses a pump body sub-component and a motor body sub-component to be completely independently separated and has an integrated water pump motor controller has a broader market prospect. Summary of the invention

[0004] In response to the above problems of electric water pumps, the purpose of the present invention is to provide a new type of vortex electronic water pump for an electric vehicle thermal management system, which can meet the structural strength of the vortex electronic water pump and the modular and integrated design requirements of the thermal management system, while achieving large flow, high head, low noise and continuous and stable output of the vortex electronic water pump, thereby ensuring the efficient operation of the electric vehicle thermal management system.

[0005] The novel vortex electronic water pump for the thermal management system of electric vehicles comprises a pump body subassembly, a motor body subassembly and a water pump motor controller; the pump body subassembly is provided with a motor rotor assembly, a motor shaft, a vortex pump base, a base anti-loosening wave pad, a filter screen, a vortex pump impeller, an impeller anti-loosening screw, a bearing 1, a bearing 2, a vortex pump housing and a vortex pump watertight sleeve; by interference assembling the bearing 2 with the bearing chamber of the vortex pump base, the inner ring of the bearing 2 and the impeller limiting D-type insert on the vortex pump impeller are interference fitted with the large end of the motor shaft in turn, the vortex pump impeller is axially fixed using the impeller anti-loosening screw, and the small end of the motor shaft is provided with a bearing 1; the bearing 1, the vortex pump base and its components are slidably fitted into the bearing chamber at the bottom and the limiting cavity at the top of the vortex pump watertight sleeve in sequence. The motor body sub-components include a motor housing, a stator core, stator core fixing screws, stator inserts, stator windings, and busbar terminals; the stator core limiting bosses on the stator core and the motor housing limiting grooves on the motor housing are aligned and pre-positioned, the stator core and the coil windings thereon are transitionally assembled in the circular cavity of the motor housing, and then two stator core fixing screws are used to connect and fix the stator core and its components to the motor housing. Then assemble the vortex pump watertight sleeve and the assembly parts thereon with the motor body subassembly, so that the outer cylindrical surface at the bottom of the vortex pump watertight sleeve is transitionally assembled with the bearing chamber inside the motor housing, and the five through holes on the top plane of the vortex pump watertight sleeve are also aligned one by one with the five threaded holes on the front end surface of the motor housing; similarly, assemble the vortex pump housing to the vortex pump watertight sleeve, and the five through holes on the vortex pump housing are also aligned one by one with the five through holes on the top plane of the vortex pump watertight sleeve, and the vortex pump housing, the vortex pump watertight sleeve and the motor housing are connected and fixed by five screws; the mechanical assembly of the pump body subassembly and the motor body subassembly is completed.

[0006] The water pump motor controller is fixed inside the rear end cavity of the motor housing with screws, and then the three-phase power terminal connection wires of the busbar terminal are welded and fixed to the circuit board of the water pump motor controller; the contact surface of the power connector and the motor housing is coated with sealant, and the power connector and the motor housing are tightened and fixed with four screws; the power connector terminal connection wires are also welded and fixed to the circuit board of the water pump motor controller; the rear cover and the motor housing are tightened and fixed with four screws, and a rear cover sealing gasket is pressed between the rear cover and the motor housing. The mechanism is simple and compact, has good compatibility, is easy to assemble, and is convenient for maintenance.

[0007] The above technical problems of the present invention are solved by the following technical solutions:

[0008] A novel vortex electronic water pump for a thermal management system of an electric vehicle is characterized in that it includes: a back cover, a magnetic ring limiting D-shaped cavity, an impeller limiting D-shaped insert, a water pump motor controller, an injection molding hole cavity, a magnetic pole position identification boss, an impeller blade extension section height, a base flow balancing groove, a back cover sealing gasket, an overflow cavity, an impeller blade misalignment angle, an impeller blade angular spacing, a motor housing, an impeller blade total length, an impeller blade straight section length, a pump housing choke groove, a pump housing flow balancing groove, a motor housing sealing ring, a base flow channel trajectory series center coordinates, a base choke groove, a base choke groove angle, a conduit terminal, a motor housing limit groove, a stator core limit boss, a water-blocking sleeve positioning column, a coolant inlet, a fastening screw, an impeller blade angular spacing 2. Length of the extended section of the impeller blades, contour of the bottom of the impeller blades, stator core, stator core fixing screws, stator inserts, vortex pump watertight sleeve, watertight sleeve positioning column 2, limit cavity 1, limit cavity 2, motor rotor assembly, impeller anti-loosening screws, anti-loosening screw buckles, bearing 1, bearing 2, stator winding, motor shaft, magnetic ring support sleeve, magnetic ring, magnetic ring injection sleeve, vortex pump base, base flow channel, overflow hole, filter, filter installation cavity, vortex pump impeller, vortex pump housing, pump housing inlet pipe angle, pump housing flow channel, pump housing choke groove angle, pump housing flow channel trajectory series center coordinates, base anti-loosening wave pad, base positioning boss 1, base positioning boss 2, pump housing sealing ring, shock absorber pad assembly, power connector.

[0009] The motor rotor assembly is provided with the magnetic ring support sleeve, the magnetic ring, and the magnetic ring injection molding sleeve. The motor shaft is configured as a regular hexahedron. The motor shaft is provided with two shoulders for limiting the magnetic ring support sleeve. A D-shaped stop surface is provided on the end cylindrical surface of the large end of the motor shaft. The outer shape of the magnetic ring support sleeve is designed to be D-shaped. The inner hole of the magnetic ring support sleeve is designed to be a regular hexahedral cavity. Six injection molding holes are provided on the magnetic ring support sleeve. The magnetic ring is provided with the magnetic ring limiting D-shaped cavity and the magnetic pole position identification boss; the small end of the motor shaft is interference fitted with the bearing 1, and a magnetic ring support sleeve is interference pressed from each end of the motor shaft and abuts against the shoulders provided on the motor shaft. The magnetic ring is pre-positioned and sleeved on the magnetic ring support sleeve through the magnetic ring limiting D-shaped cavity, and the magnetic ring, the magnetic ring support sleeve and the motor shaft are injection-molded and connected and fixed through the injection molding hole cavity. The magnetic ring injection molding sleeve completely covers the magnetic ring support sleeve and the magnetic ring to avoid direct contact between the magnetic ring support sleeve and the magnetic ring and the coolant, thereby eliminating the corrosion of the coolant to the magnetic ring support sleeve and the magnetic ring; the magnetic ring is radially magnetized along the circumference through the magnetic pole position identification boss, and the magnetic ring is arranged into 2 pairs of poles or 3 pairs of poles; the bearing is arranged as a semi-ceramic deep groove ball bearing without a dustproof ring or an engineering plastic deep groove ball bearing without a dustproof ring, which has better wear resistance, corrosion resistance, self-lubrication and other characteristics.

[0010] The vortex pump base is provided with the overflow hole, the center coordinates of the base flow channel trajectory series, the base flow blocking groove, the base flow blocking groove angle, the coolant inlet, the base flow equalizing groove, the overflow cavity, the base flow channel, the filter, the filter installation cavity, the base positioning boss one, and the base positioning boss two; the vortex pump base is provided with a Cartesian plane rectangular coordinate system, the center coordinates of the base flow channel are located in the first quadrant of the Cartesian plane rectangular coordinate system, the value range of the center coordinates of the base flow channel trajectory series on the horizontal axis of the Cartesian plane rectangular coordinate system is set to 0.40 mm to 3.00 mm, and the value range on the vertical axis is set to 0.15 mm to 2.50 mm; the two overflow holes are located on the same side of the coolant inlet, and the two filters are respectively pressed into the two filter installation cavities, and the filter filters the larger impurities in the coolant and passes through the overflow hole, the overflow hole, the overflow hole, the filter, the filter, the filter installation cavity, the base positioning boss one, and the base positioning boss two. The air in the circular cavity of the vortex pump watertight sleeve is discharged from the cavity; the base choke groove is located above the base flow channel, and the geometric structure close to the coolant inlet is set to a straight line shape, and the angle between the base choke groove and the horizontal axis of the Cartesian plane rectangular coordinate system is set to 80.0° (degrees) to 89.0° (degrees); the base flow balancing groove is used to collect larger particles of impurities in the coolant inside the pump housing and solid impurities caused by friction and other reasons; the boss cylinder diameter of the base positioning boss one is set to 1.20 times the boss cylinder diameter of the base positioning boss two; the base anti-loosening wave pad is mounted on the outer cylindrical surface of the vortex pump base; the bearing chamber of the vortex pump base is interference fitted with the bearing two, and the bearing two is set to a semi-dust ring and semi-ceramic deep groove ball bearing or a semi-dust ring engineering plastic deep groove ball bearing, which has better wear resistance, corrosion resistance, self-lubrication and other properties.

[0011] The vortex pump impeller is provided with the impeller blade misalignment angle, the impeller blade angular spacing one, the impeller blade total length, the impeller blade straight section length, the impeller blade angular spacing two, the impeller blade extension section length, the impeller blade bottom profile, the impeller limit D-type insert, and the impeller blade extension section height; the blades of the vortex pump impeller and the blades close to the center of the impeller are set to be arc-shaped, the total number of blades on one side of the vortex pump impeller is set to range from 8 to 48, and the number of blades on both sides of the vortex pump impeller is set to are equal; the angle value of the impeller blade angular spacing 2 is set to 1.15 times the angle value of the impeller blade angular spacing 1, the impeller blade angular spacing 2 and the impeller blade angular spacing 1 are arranged adjacent to each other, and the impeller blade angular spacing 2 and the impeller blade angular spacing 1 are distributed along the circumferential array of the vortex pump impeller; the impeller blade misalignment angle is set so that the angle value range of the relative angular displacement of the blades on both sides of the vortex pump impeller is 1.0° (degrees) to 3.0° (degrees); the length value range of the impeller blade total length is set to the vortex The range of the length of the impeller blade extension section is set to 0.30 times to 0.50 times the radius value of the pump impeller, the range of the length value of the impeller blade extension section length is set to 0.70 times to 0.86 times the length value of the total length of the impeller blade, the range of the height value of the impeller blade extension section height is set to 1.00 mm to 5.00 mm, the range of the length value of the impeller blade straight section length is set to 0.72 times to 0.85 times the length value of the impeller blade extension section length, and the bottom contour of the impeller blade is set to a curved surface shape; through the rotation of the vortex pump impeller The coolant forms a partial turbulent state during the flow along the wall of the pump casing pipeline, and liquids in different flow states in different parts participate in heat exchange, thereby improving the heat exchange efficiency of the coolant. The height of the extended section of the impeller blades is optimized to have a stepped structural feature, so that the blades of the vortex pump impeller increase the effective contact area with the coolant, increase the water control volume of each cavity formed by the blades of the vortex pump impeller, and further improve the output flow of the vortex electronic water pump; the impeller limit D-type insert is provided with a stop for the anti-loosening screw buckle.

[0012] The vortex pump watertight sleeve is provided with the watertight sleeve positioning column 1, the watertight sleeve positioning column 2, the limiting cavity 1, and the limiting cavity 2; the cavity cylindrical diameter of the limiting cavity 1 is set to 1.20 times the cavity cylindrical diameter of the limiting cavity 2; a circular cavity is provided at the center of the end face of the vortex pump watertight sleeve, and the vortex pump base is assembled in the circular cavity provided at the center of the end face of the vortex pump watertight sleeve, and the limiting cavity 1 is paired with the base positioning boss 1 and the limiting cavity 2 is paired with the base positioning boss 2 to constrain and limit the rotation of the pump. The vortex pump base rotates and fixes its position in the circular cavity provided at the center position of the end surface of the vortex pump watertight sleeve; the watertight sleeve positioning column 1 corresponds to the limiting groove of the motor housing, and the watertight sleeve positioning column 2 corresponds to another limiting groove provided in the motor housing. The bottom of the inner circular cavity of the vortex pump watertight sleeve is provided with a bearing chamber slidably assembled with the bearing 1, and the bottom outer cylinder of the vortex pump watertight sleeve is assembled in the bearing chamber provided at the bottom of the circular cavity of the motor housing; three small threaded holes are provided on the end surface of the bottom outer cylinder of the vortex pump watertight sleeve.

[0013] The vortex pump housing is provided with an angle of the pump housing inlet pipe, the pump housing flow channel, an angle of the pump housing flow blocking groove, a center coordinate of a series of pump housing flow channel trajectories, the pump housing flow blocking groove, and a pump housing flow balancing groove; the vortex pump housing is provided with a Cartesian plane rectangular coordinate system 1, the center coordinate of the pump housing flow channel is located in the second quadrant of the Cartesian plane rectangular coordinate system 1, the absolute value range of the center coordinate of the pump housing flow channel trajectory series on the horizontal axis of the Cartesian plane rectangular coordinate system 1 is set to 0.40 mm to 3.50 mm, and the value range on the vertical axis is set to 0.20 mm to 3.00 mm; the pump housing flow blocking groove is located at the pump housing flow channel. The geometric structure above the channel and close to the side of the pump housing inlet pipe is set to a straight line shape, and the angle value of the pump housing flow blocking groove angle and the angle value range of the horizontal axis of the Cartesian plane rectangular coordinate system 1 are set to 78.0° (degrees) to 88.0° (degrees); the pump housing flow balancing groove is used to collect larger particles of impurities in the coolant inside the pump housing and solid impurities caused by friction and other reasons; the angle of the pump housing inlet pipe and the horizontal axis of the Cartesian plane rectangular coordinate system 1 are set to 78.0° (degrees) to 89.0° (degrees); a circular ring groove is provided on the end face of the vortex pump housing, and the pump housing sealing ring is installed in the provided circular ring groove.

[0014] The bearing chamber provided in the vortex pump base is interference fitted with the bearing 2, the motor shaft is injection-molded and fixed to the motor rotor assembly, the inner ring of the bearing 2 is interference pressed on the bearing position provided at the large end of the motor shaft, and the impeller limiting D-type insert and the D-type stop surface provided on the large end of the motor shaft are aligned and pre-positioned, and the vortex pump impeller is installed on the motor shaft with interference fit, the impeller anti-loosening screw is provided with the anti-loosening screw buckle, the impeller anti-loosening screw is tightened and pressed against the end face of the impeller limiting D-type insert, the anti-loosening screw buckle is riveted at the stop provided on the impeller limiting D-type insert, and the impeller anti-loosening screw is fixed to prevent the vortex pump impeller from falling off due to loosening; the vortex pump impeller and its assembly are connected to the vortex pump watertight sleeve During the assembly, the bearing is slidably assembled in the bearing chamber provided at the bottom of the circular cavity of the vortex pump watertight sleeve, the vortex pump base is assembled in the circular cavity provided at the center position of the end face of the vortex pump watertight sleeve, and then the vortex pump housing equipped with the pump housing sealing ring is installed on the end face of the vortex pump watertight sleeve, the inner circular cavity step surface on the vortex pump housing abuts against the base anti-loosening wave pad, the base anti-loosening wave pad effectively compensates for the accumulated dimensional tolerances of the assembly of related parts, limits the axial displacement of the vortex pump base, and solves the problem of axial movement of the rotating shaft of the vortex electronic water pump, the five screw through holes provided on the vortex pump housing are aligned with the five screw through holes provided on the end face of the vortex pump watertight sleeve; the mechanism assembly of the pump body components is completed.

[0015] The motor housing is provided with the motor housing limiting groove, the front end surface of the motor housing is provided with an elliptical annular rectangular groove, the motor housing sealing ring is installed in the elliptical annular rectangular groove, the front end surface of the motor housing is also provided with five threaded holes, the bottom of the motor housing is provided with four symmetrically distributed shock-absorbing pad mounting holes, the four shock-absorbing pad assemblies are installed in the four shock-absorbing pad mounting holes, the inner circular cavity of the motor housing is provided with two cavities arranged to the left with the center axis of the cavity as the center, and a threaded hole is respectively provided on the bottom plane of the two cavities; the stator core is provided with the stator core limiting boss, the stator core limiting boss is matched and positioned with the motor housing limiting groove, the outer cylindrical surface of the stator core is provided with two bosses arranged symmetrically with the center axis of the outer cylindrical surface as the center, and a threaded through hole is respectively provided on the two bosses; the number of tooth slots of the stator core is set to 6 slots or 9 slots, the stator winding adopts a fractional slot concentrated winding design; one stator insert is inserted at each end of the stator core, the inside of the stator insert is wound with a single-stack copper enameled wire, the wire diameter specification of the copper enameled wire is 0.90 mm or 1.00 mm in diameter, the coil of the stator winding adopts a Δ (triangle) connection method, the three-phase power terminal wire of the stator winding and the busbar terminal are welded and connected, the stator core limiting boss is aligned and pre-positioned with the motor housing limiting groove, the stator core and its components are assembled in the circular cavity of the motor housing by transition fit, and then the stator core and its components are connected and fixed to the motor housing by two stator core fixing screws, and the assembly joint surface of the stator core and the motor housing is coated with insulating thermal conductive silicone to improve the thermal conductivity and vibration resistance of the stator core and its components; the mechanism assembly of the motor body components is completed.

[0016] Assemble the assembled pump body sub-assembly mechanism and the motor body sub-assembly mechanism, install the outer cylinder at the bottom of the vortex pump watertight jacket in the bearing chamber provided at the bottom of the circular cavity of the motor housing, align the five through holes on the vortex pump housing with the five through holes on the top plane of the vortex pump watertight jacket one by one, use five screws to connect and fix the vortex pump housing, the vortex pump watertight jacket and the motor housing, and then use three of the fastening screws to tighten the vortex pump watertight jacket and the motor housing; fix the water pump motor controller to the rear end cavity of the motor housing with screws , and then the three-phase power terminal connection wires of the busbar terminal blocks are welded and fixed to the circuit board of the water pump motor controller; the installation contact surface of the power connector and the motor housing is coated with sealant, and the power connector and the motor housing are tightened and fixed with four screws, the terminal connection wires of the power connector are also welded and fixed to the circuit board of the water pump motor controller, the rear cover and the motor housing are tightened and fixed with four screws, and the rear cover sealing gasket is pressed between the rear cover and the motor housing; the present invention greatly reduces the complexity of mechanism assembly and significantly improves the qualified rate of finished product assembly.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. The overall plastic-wrapped structure of the motor rotor assembly is innovatively designed to eliminate the failure caused by the corrosion of the rotor magnetic ring by the coolant. It has extremely low fluid friction resistance and efficient rotor dynamic balancing performance. The technical solution of magnetizing the magnetic ring after injection molding is applied to avoid the local demagnetization of the magnetic ring due to high temperature, high humidity and other reasons, ensuring that the surface magnetic strength of the magnetic ring is uniform and consistent;

[0019] 2. The novel structural feature of the vortex pump impeller provided in the present invention is that, through the rotation of the vortex pump impeller, the coolant forms a partial turbulent state during the flow along the wall of the pump casing pipeline, and the liquids in different flow states in different parts participate in heat exchange, thereby improving the heat exchange efficiency of the coolant. The height of the extended section of the impeller blades is set as a stepped structural feature, so that the blades of the vortex pump impeller increase the effective contact area with the coolant, further increasing the water control volume of each cavity formed by the blades of the vortex pump impeller, and realizing the continuous and stable operation of the vortex electronic water pump with large flow, high head and low noise;

[0020] 3. Use half dust ring and half ceramic deep groove ball bearings or half dust ring engineering plastic deep groove ball bearings, because they have high speed, low noise, light weight, wear resistance, corrosion resistance, and especially self-lubricating properties, and are particularly suitable for long-term operation immersed in coolant;

[0021] 4. The present invention integrates the motor rotor assembly into the vortex pump water-blocking jacket of the pump body subassembly, so that the coolant in the pump housing is completely separated from the motor stator winding coil, thereby avoiding failure of the motor stator winding coil and the water pump motor controller due to coolant leakage;

[0022] 5. The present invention adopts the technical solution of assembling and fixing the stator core assembly inside the motor housing cavity by using two stator core fixing screws. Compared with the method of shrink-fitting the stator core by interference fit, the technical solution of the present invention is particularly convenient for disassembly and assembly, greatly reduces the complexity of assembly, and significantly improves the qualified rate of finished product assembly;

[0023] 6. The assembly interface between the stator core and the motor housing of the present invention is coated with insulating thermally conductive silicone, which is beneficial to improving the thermal conductivity and vibration resistance of the stator core and its components, reducing the iron loss of the stator core and the copper loss of the winding coil, and improving the output power of the motor;

[0024] 7. The base anti-loosening pad of the present invention effectively compensates for the accumulated dimensional tolerances of the assembly of related parts, limits the axial displacement of the vortex pump base, and solves the problem of axial movement of the rotating shaft of the vortex electronic water pump;

[0025] 8. The present invention utilizes the base flow balancing groove and the pump housing flow balancing groove to collect larger particles of impurities in the coolant inside the pump housing and solid impurities caused by friction and the like;

[0026] 9. The present invention has a compact structure, good sealing, high integration, and applies a speed closed-loop drive control strategy. It has a low cost and is particularly suitable for electric vehicle thermal management systems that require higher modularity, lightness, and integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0028] Figure 1 It is an exploded schematic diagram of the three-dimensional assembly structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall assembly cross-sectional structure of the present invention;

[0030] Figure 3 This is a schematic diagram of assembling the stator core of the motor of the present invention;

[0031] Figure 4 It is a cross-sectional schematic diagram of the assembly of the vortex pump impeller and the motor rotor assembly of the present invention;

[0032] Figure 5 This is a schematic diagram of the assembly structure of the motor rotor assembly of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the water blocking jacket of the vortex pump of the present invention;

[0034] Figure 7 This is a schematic diagram of the flow channel side structure of the vortex pump base of the present invention;

[0035] Figure 8 It is a schematic diagram of the side structure of the positioning boss of the vortex pump base and the installation arrangement of the filter screen of the present invention;

[0036] Fig. 9 This is a schematic diagram of the structure of the vortex pump impeller of the present invention;

[0037] Fig.10 It is a schematic diagram of the vortex pump housing structure of the present invention.

[0038] In the attached figure: 1. rear cover; 2. magnetic ring limit D-shaped cavity; 3. impeller limit D-shaped insert; 5. water pump motor controller; 6. injection molding hole cavity; 7. magnetic pole position identification boss; 8. impeller blade extension section height; 9. base flow balancing groove; 10. rear cover sealing gasket; 11. overflow cavity; 12. impeller blade misalignment angle; 13. impeller blade angular spacing one; 15. motor housing; 16. impeller blade total length; 17. impeller blade straight section length; 18. pump housing flow blocking groove ; 19. Pump housing flow balancing groove; 20. Motor housing sealing ring; 21. Center coordinates of the flow path trajectory series of the base; 22. Base flow blocking groove; 23. Base flow blocking groove angle; 25. Busbar terminal; 26. Motor housing limit groove; 27. Stator core limit boss; 28. Waterproof sleeve positioning column 1; 29. ​​Coolant inlet; 30. Fastening screw; 31. Impeller blade angular spacing 2; 32. Impeller blade extension section length; 33. Impeller blade bottom contour; 35 . stator core; 36. stator core fixing screw; 40. stator insert; 45. vortex pump watertight sleeve; 46. watertight sleeve positioning column 2; 47. limit cavity 1; 48. limit cavity 2; 50. motor rotor assembly; 51. impeller anti-loosening screw; 52. anti-loosening screw buckle; 53. bearing 1; 55. bearing 2; 56. stator winding; 60. motor shaft; 61. magnetic ring support sleeve; 62. magnetic ring; 63. magnetic ring injection sleeve; 65. vortex pump base; 6 6. Base flow channel; 67. Overflow hole; 68. Filter; 69. Filter installation cavity; 70. Vortex pump impeller; 75. Vortex pump housing; 76. Pump housing inlet pipe angle; 77. Pump housing flow channel; 78. Pump housing choke groove angle; 79. Pump housing flow channel trajectory series center coordinates; 80. Base anti-loosening pad; 81. Base positioning boss 1; 82. Base positioning boss 2; 85. Pump housing sealing ring; 90. Shock-absorbing pad assembly; 95. Power connector. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements and numerical values ​​of the components and steps described in these embodiments do not limit the scope of the present invention.

[0040] The following description of at least one exemplary embodiment is in fact merely illustrative and is not intended to be any limitation to the present invention and its application or use. In all examples shown and discussed herein, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, no further discussion is required in subsequent drawings.

[0041] The terms "including", "having", "having", "having", "set to", "set to", "set to", and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatuses; in addition, the term "(degree)" indicates that its value is an angular unit;

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "side", "axial", "radial", "center of circle", "circumference", "left", "right", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; unless otherwise clearly specified and limited; in addition, the terms "installation", "assembly", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention discloses a novel vortex electronic water pump for a thermal management system of an electric vehicle, comprising a rear cover 1, a magnetic ring limiting D-shaped cavity 2, an impeller limiting D-shaped insert 3, a water pump motor controller 5, an injection hole cavity 6, a magnetic pole position identification boss 7, an impeller blade extension section height 8, a base flow balancing groove 9, a rear cover sealing gasket 10, an overflow cavity 11, an impeller blade misalignment angle 12, an impeller blade angular spacing 13, a motor housing 15, an impeller blade total length 16, an impeller blade straight section length 17, a pump housing flow blocking groove 18, a pump housing flow balancing groove 19, a motor housing sealing ring 20, a base flow channel trajectory series center coordinate 21, a base flow blocking groove 22, a base flow blocking groove angle 23, a confluence plate terminal 25, a motor housing limiting groove 26, a stator core limiting boss 27, a water stopper positioning column 1 28, a coolant inlet 29, a fastening screw 30, an impeller blade angular spacing 2 31, an impeller blade extension section length 3 2. Impeller blade bottom profile 33, stator core 35, stator core fixing screw 36, stator insert 40, vortex pump watertight sleeve 45, watertight sleeve positioning column 2 46, limit cavity 1 47, limit cavity 2 48, motor rotor assembly 50, impeller anti-loosening screw 51, anti-loosening screw buckle 52, bearing 1 53, bearing 2 55, stator winding 56, motor shaft 60, magnetic ring support sleeve 61, magnetic ring 62, magnetic ring injection sleeve 63, vortex Pump base 65, base flow channel 66, overflow hole 67, filter 68, filter installation cavity 69, vortex pump impeller 70, vortex pump housing 75, pump housing inlet pipe angle 76, pump housing flow channel 77, pump housing choke groove angle 78, pump housing flow channel trajectory series center coordinates 79, base anti-loosening pad 80, base positioning boss 1 81, base positioning boss 2 82, pump housing sealing ring 85, shock absorbing pad assembly 90, power connector 95.

[0044] The motor rotor assembly 50 shown in the drawings of the present invention is provided with a magnetic ring support sleeve 61, a magnetic ring 62, and a magnetic ring injection molding sleeve 63. The motor shaft 60 is set to be a regular hexahedron. The motor shaft 60 is provided with two shaft shoulders for limiting the magnetic ring support sleeve 61. A D-shaped stop surface is provided on the end cylindrical surface of the large end of the motor shaft 60. The outer shape of the magnetic ring support sleeve 61 is designed to be a D-shaped shape. The inner hole of the magnetic ring support sleeve 61 is designed to be a regular hexahedral cavity. Six injection molding holes 6 are provided on the magnetic ring support sleeve 61. The magnetic ring 62 is provided with a magnetic ring limiting D-shaped cavity 2 and a magnetic pole position identification boss 7; the number of magnetic poles of the magnetic ring 62 is set to 2 pairs of poles or 3 pairs of poles, and the motor shaft 60 is fixedly connected to the motor rotor assembly 50 by injection molding;

[0045] The vortex pump base 65 shown in the drawings of the present invention is provided with an overflow hole 67, a base flow channel trajectory series center coordinate 21, a base choke groove 22, a base choke groove angle 23, a coolant inlet 29, a base flow balancing groove 9, an overflow cavity 11, a base flow channel 66, a filter screen 68, a filter screen mounting cavity 69, a base positioning boss 1 81, and a base positioning boss 2 82; the vortex pump base 65 is provided with a Cartesian plane rectangular coordinate system, the center coordinate of the base flow channel 66 is located in the first quadrant of the Cartesian plane rectangular coordinate system, and the center coordinate of the base flow channel trajectory series 21 is on the horizontal coordinate axis of the Cartesian plane rectangular coordinate system. The numerical range is set to 0.40 mm to 3.00 mm, and the numerical range on the ordinate axis is set to 0.15 mm to 2.50 mm; the two overflow holes 67 are located on the same side of the coolant inlet 29, the base choke groove 22 is located above the base flow channel 66, and the geometric structure close to the coolant inlet 29 is set to a straight line shape, and the angle value range of the base choke groove angle 23 and the horizontal axis of the Cartesian plane rectangular coordinate system is set to 80.0° (degrees) to 89.0° (degrees); the boss cylinder diameter of the base positioning boss 1 81 is set to 1.20 times the boss cylinder diameter of the base positioning boss 2 82;

[0046] The vortex pump impeller 70 shown in the drawings of the present invention is provided with the impeller blade misalignment angle 12, the impeller blade angular spacing 13, the impeller blade total length 16, the impeller blade straight section length 17, the impeller blade angular spacing 2 31, the impeller blade extension section length 32, the impeller blade bottom profile 33, the impeller limit D-type insert 3, and the impeller blade extension section height 8; the blades of the vortex pump impeller 70 and the blades close to the center of the impeller are set to be arc-shaped, the total number of blades on one side of the vortex pump impeller 70 is set in the range of 8 to 48, and the number of blades on both sides of the vortex pump impeller 70 is set to be equal; the angle value of the impeller blade angular spacing 2 31 is set to 1.15 times the angle value of the impeller blade angular spacing 13, the impeller blade angular spacing 2 31 and the impeller blade angular spacing 13 are arranged adjacent to each other, and the impeller blade angular spacing 2 31 and the impeller blade angular spacing 13 are arranged along The vortex pump impeller 70 is distributed in a circular array, the impeller blade misalignment angle 12 is set to the angle value range of the relative angular displacement of the blades on both sides of the vortex pump impeller 70 is 1.0° (degrees) to 3.0° (degrees), the length value range of the impeller blade total length 16 is set to 0.30 times to 0.50 times the radius value of the vortex pump impeller 70, the length value range of the impeller blade extension section length 32 is set to 0.70 times to 0.86 times the length value of the impeller blade total length 16, the height value range of the impeller blade extension section height 8 is set to 1.00 mm to 5.00 mm, the length value range of the impeller blade straight section length 17 is set to 0.72 times to 0.85 times the length value of the impeller blade extension section length 32, the impeller blade bottom profile 33 is set to an arc surface shape, and the impeller limit D-type insert 3 is provided with a stop for preventing the screw buckle 52 from loosening;

[0047] The vortex pump watertight sleeve 45 shown in the drawings of the present invention is provided with a watertight sleeve positioning column 1 28, a watertight sleeve positioning column 2 46, a limiting cavity 1 47, and the limiting cavity 2 48; the cavity cylindrical diameter of the limiting cavity 1 47 is set to 1.20 times the cavity cylindrical diameter of the limiting cavity 2 48, a circular cavity is provided at the center position of the end face of the vortex pump watertight sleeve 45, a bearing chamber slidably assembled with a bearing 1 53 is provided at the bottom of the inner circular cavity of the vortex pump watertight sleeve 45, and three small threaded holes are provided on the end face of the outer cylindrical body at the bottom of the vortex pump watertight sleeve 45;

[0048] The vortex pump housing 75 shown in the drawings of the present invention is provided with a pump housing inlet pipe angle 76, a pump housing flow channel 77, a pump housing flow choke groove angle 78, a pump housing flow channel trajectory series center coordinate 79, a pump housing flow choke groove 18, and a pump housing flow equalizing groove 19; the vortex pump housing 75 is provided with a Cartesian plane rectangular coordinate system 1, the center coordinate of the pump housing flow channel 77 is located in the second quadrant of the Cartesian plane rectangular coordinate system 1, the absolute value range of the value of the pump housing flow channel trajectory series center coordinate 79 on the Cartesian plane rectangular coordinate system 1 is set to 0.40 mm to 3.50 mm, and the value range on the vertical axis is set to 0.20 mm to 3.00 mm; the pump housing flow choke groove 18 is located in the pump housing The geometric structure above the body flow channel 77 and close to the side of the pump housing inlet pipe is set to a straight line shape, and the angle value of the pump housing choke groove angle 78 and the angle value range of the horizontal axis of the Cartesian plane rectangular coordinate system 1 are set to 78.0° (degrees) to 88.0° (degrees); the pump housing flow balancing groove 19 is used to collect larger particles of impurities in the coolant inside the pump housing and solid impurities caused by friction and other reasons; the pump housing inlet pipe angle 76 and the horizontal axis of the Cartesian plane rectangular coordinate system 1 are set to 78.0° (degrees) to 89.0° (degrees); a circular ring groove is provided on the end surface of the vortex pump housing 75, and the pump housing sealing ring 85 is installed in the provided circular ring groove;

[0049] The motor housing 15 shown in the drawings of the present invention is provided with a motor housing limit groove 26, an elliptical annular rectangular groove is provided on the front end surface of the motor housing 15, and the motor housing sealing ring 20 is installed in the elliptical annular rectangular groove. Five threaded holes are also provided on the front end surface of the motor housing 15, and four symmetrically distributed shock-absorbing pad mounting holes are provided at the bottom of the motor housing 15. Four shock-absorbing pad assemblies 90 are installed in the four shock-absorbing pad mounting holes. The inner circular cavity of the motor housing 15 is provided with two cavities arranged to the left with the center axis of the cavity as the center, and a threaded hole is provided on the bottom plane of each of the two cavities; the stator core 35 is provided with a stator The core limiting boss 27 is matched with the motor housing limiting groove 26 for positioning. Two bosses are arranged symmetrically with the center axis of the outer cylindrical surface as the center on the outer cylindrical surface of the stator core 35, and each of the two bosses is provided with a threaded through hole; the number of tooth slots of the stator core 35 is set to 6 slots or 9 slots, and the stator winding 56 adopts a fractional slot concentrated winding design; a stator insert 40 is inserted at each end of the stator core 35, and the stator insert 40 is wound with a single-stack copper enameled wire, and the wire diameter specification of the copper enameled wire is 0.90 mm or 1.00 mm in diameter, and the coil of the stator winding 56 adopts a Δ (triangle) connection method;

[0050] The bearing 1 53 shown in the drawings of the present invention is configured as a dust-proof ring-free semi-ceramic deep groove ball bearing or a dust-proof ring-free engineering plastic deep groove ball bearing; the bearing 2 55 is configured as a half-dust-ring half-ceramic deep groove ball bearing or a half-dust-ring engineering plastic deep groove ball bearing.

[0051] Further, the small end of the motor shaft 60 is interference fitted with the bearing 53, and a magnetic ring support sleeve 61 is interference pressed from both ends of the motor shaft 60 and abuts against the shaft shoulder set on the motor shaft 60. The magnetic ring 62 is pre-positioned and sleeved on the magnetic ring support sleeve 61 through the magnetic ring limit D-shaped cavity 2. The magnetic ring 62, the magnetic ring support sleeve 61, and the motor shaft 60 are injection-molded and connected and fixed through the injection molding hole 6. The magnetic ring injection molding sleeve 63 completely covers the magnetic ring support sleeve 61 and the magnetic ring 62 to prevent the magnetic ring support sleeve 61 and the magnetic ring 62 from directly contacting the coolant, thereby eliminating the corrosion of the coolant to the magnetic ring support sleeve 61 and the magnetic ring 62; the magnetic ring 62 is magnetized radially along the circumference through the magnetic pole position identification boss 7;

[0052] Furthermore, two filters 68 are respectively pressed into two filter installation cavities 69, and the filter 68 filters the larger impurities in the coolant and flows into the circular cavity of the vortex pump watertight sleeve 45 through the overflow hole 67 and the overflow cavity 11, while discharging the air in the circular cavity of the vortex pump watertight sleeve 45; the base flow balancing groove 9 is used to collect larger particles of impurities in the coolant inside the pump housing and solid impurities caused by friction and other reasons; a base anti-loosening pad 80 is mounted on the outer cylindrical surface of the vortex pump base 65;

[0053] Furthermore, the bearing chamber of the vortex pump base 65 is interference-fitted with the bearing 2 55, and the inner ring of the bearing 2 55 is interference-pressed in the bearing position set at the large end of the motor shaft 60. The impeller limiting D-type insert 3 and the D-type stop surface set on the large end of the motor shaft 60 are aligned and pre-positioned, and the vortex pump impeller 70 is interference-fitted and installed on the motor shaft 60. An anti-loosening screw buckle 52 is provided on the impeller anti-loosening screw 51. The impeller anti-loosening screw 51 is tightened and pressed against the end face of the impeller limiting D-type insert 3. The anti-loosening screw buckle 52 is riveted on the stop provided on the impeller limiting D-type insert 3 to fix the impeller anti-loosening screw 51 to prevent the vortex pump impeller 70 from falling off due to loosening; the vortex pump impeller 70 and its assembly parts are assembled with the vortex pump watertight sleeve 45, and the bearing 1 53 is slidably assembled on the vortex pump watertight sleeve In the bearing room provided at the bottom of the circular cavity 45, the vortex pump base 65 is assembled in the circular cavity provided at the center position of the end face of the vortex pump watertight sleeve 45, and the rotation of the vortex pump base 65 in the circular cavity provided at the center position of the end face of the vortex pump watertight sleeve 45 is restricted and its position is fixed by pairing the limit cavity 1 47 with the base positioning boss 1 81 and the limit cavity 2 48 with the base positioning boss 2 82; then the vortex pump housing 75 equipped with the pump housing sealing ring 85 is installed on the end face of the vortex pump watertight sleeve 45, the inner circular cavity step surface on the vortex pump housing 75 abuts against the base anti-loosening wave pad 80, and the five screw through holes provided on the vortex pump housing 75 are aligned with the five screw through holes provided on the end face of the vortex pump watertight sleeve 45; the assembly of the pump body components is completed.

[0054] Furthermore, the three-phase power terminal wires of the stator winding 56 are welded and connected to the busbar terminal 25, and the stator core limiting boss 27 is pre-aligned with the motor housing limiting groove 26 to be pre-positioned, and the stator core 35 and its components are assembled in the circular cavity of the motor housing 15 by transition fit, and then two stator core fixing screws 36 are used to connect and fix the stator core 35 and its components to the motor housing 15, and insulating thermal conductive silicone is coated on the assembly joint surface between the stator core 35 and the motor housing 15 to improve the thermal conductivity and vibration resistance of the stator core 35 and its components; the structural assembly of the motor body components is completed.

[0055] Furthermore, the assembled pump body sub-assembly mechanism and the motor body sub-assembly mechanism are assembled, the outer cylinder at the bottom of the vortex pump watertight sleeve 45 is installed in the bearing room provided at the bottom of the circular cavity of the motor housing 15, the watertight sleeve positioning column 1 28 corresponds to the motor housing limit groove 26, and the watertight sleeve positioning column 2 46 corresponds to another limit groove provided in the motor housing 15, and the five through holes on the vortex pump housing 75 are aligned one by one with the five through holes on the top plane of the vortex pump watertight sleeve 45, and the vortex pump housing 75, the vortex pump watertight sleeve 45 and the motor housing 15 are connected and fixed with five screws, and then the vortex pump watertight sleeve 45 and the motor housing 15 are tightened with three fastening screws 30;

[0056] Furthermore, the water pump motor controller 5 is fixed inside the rear end cavity of the motor housing 15 by screw connection, and then the three-phase power terminal connection wires of the busbar terminal 25 are welded and fixed to the circuit board of the water pump motor controller 5; the installation contact surface of the power connector 95 and the motor housing 15 is coated with sealant, and the power connector 95 and the motor housing 15 are tightened and fixed with four screws, the terminal connection wires of the power connector 95 are also welded and fixed to the circuit board of the water pump motor controller 5, the rear cover 1 and the motor housing 15 are tightened and fixed with four screws, and a rear cover sealing gasket 10 is pressed between the rear cover 1 and the motor housing 15; the present invention greatly reduces the complexity of the mechanism assembly and significantly improves the qualified rate of finished product assembly.

[0057] In addition to the above, although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention; the above embodiments may be modified without departing from the scope and spirit of the present invention, but any technical solution formed by equivalent substitution or equivalent transformation shall fall within the scope of protection required by the present invention, and the scope of the present invention shall be defined by the appended claims.

Claims

1. A novel vortex electronic water pump for electric vehicle thermal management system, characterized in that: include: Back cover, magnetic ring limit D-type cavity, impeller limit D-type insert, water pump motor controller, injection molding hole cavity, magnetic pole position identification boss, impeller blade extension section height, base flow groove, back cover sealing gasket, overflow cavity, impeller blade misalignment angle, impeller blade angular spacing 1, motor housing, impeller blade total length, impeller blade straight section length, pump housing choke groove, pump housing flow groove, motor housing sealing ring, base flow track series center coordinates, base choke groove, base choke groove angle, busbar terminal, motor housing limit groove, stator core limit boss, water-blocking sleeve positioning column 1, coolant inlet, fastening screws, impeller blade angular spacing 2, impeller blade extension section length, impeller blade The bottom contour of the sheet, the stator core, the stator core fixing screws, the stator insert, the vortex pump watertight sleeve, the watertight sleeve positioning column 2, the limit cavity 1, the limit cavity 2, the motor rotor assembly, the impeller anti-loosening screw, the anti-loosening screw buckle, the bearing 1, the bearing 2, the stator winding, the motor shaft, the magnetic ring support sleeve, the magnetic ring, the magnetic ring injection sleeve, the vortex pump base, the base flow channel, the overflow hole, the filter, the filter installation cavity, the vortex pump impeller, the vortex pump housing, the pump housing inlet pipe angle, the pump housing flow channel, the pump housing choke groove angle, the pump housing flow channel trajectory series center coordinates, the base anti-loosening wave pad, the base positioning boss 1, the base positioning boss 2, the pump housing sealing ring, the shock absorbing pad assembly, and the power connector; The motor rotor assembly is provided with the magnetic ring support sleeve, the magnetic ring, and the magnetic ring injection molding sleeve. The motor shaft is configured as a regular hexahedron. The motor shaft is provided with two shaft shoulders for limiting the magnetic ring support sleeve. A D-shaped stop surface is provided on the end cylindrical surface of the large end of the motor shaft. The outer shape of the magnetic ring support sleeve is designed to be D-shaped. The inner hole of the magnetic ring support sleeve is designed to be a regular hexahedral cavity. The magnetic ring support sleeve is provided with six injection molding holes. The magnetic ring is provided with the magnetic ring limiting D-shaped cavity and the magnetic pole position identification boss. The magnetic ring, the magnetic ring support sleeve, and the motor shaft are injection-molded and fixed through the injection molding holes. The magnetic ring injection molding sleeve completely covers the magnetic ring support sleeve and the magnetic ring. The magnetic ring is magnetized radially along the circumference through the magnetic pole position identification boss. The magnetic ring is configured to have 2 pairs of poles or 3 pairs of poles. The vortex pump base is provided with the overflow hole, the center coordinates of the base flow channel trajectory series, the base flow blocking groove, the base flow blocking groove angle, the coolant inlet, the base flow balancing groove, the overflow cavity, the base flow channel, the filter screen, the filter screen installation cavity, the base positioning boss 1, and the base positioning boss 2; the vortex pump base is provided with a Cartesian plane rectangular coordinate system, and the center coordinates of the base flow channel are located in the first quadrant of the Cartesian plane rectangular coordinate system; The vortex pump impeller is provided with the impeller blade misalignment angle, the impeller blade angular spacing 1, the impeller blade total length, the impeller blade straight section length, the impeller blade angular spacing 2, the impeller blade extension section length, the impeller blade bottom profile, the impeller limit D-shaped insert, and the impeller blade extension section height; the impeller limit D-shaped insert is provided with a stop for the anti-loosening screw buckle; The vortex pump watertight sleeve is provided with the watertight sleeve positioning column 1, the watertight sleeve positioning column 2, the limiting cavity 1, and the limiting cavity 2; the motor housing is provided with the motor housing limiting groove, and the stator core is provided with the stator core limiting boss, and the stator core limiting boss is matched with the motor housing limiting groove for positioning; The vortex pump housing is provided with the pump housing inlet pipe angle, the pump housing flow channel, the pump housing choke groove angle, the pump housing flow channel trajectory series center coordinates, the pump housing choke groove, and the pump housing flow equalizing groove; the vortex pump housing is provided with a Cartesian plane rectangular coordinate system 1, and the center coordinates of the pump housing flow channel are located in the second quadrant of the Cartesian plane rectangular coordinate system 1, and the inner circular cavity step surface on the vortex pump housing abuts against the base anti-loosening wave pad, and the base anti-loosening wave pad effectively compensates for the accumulated dimensional tolerances of the assembly of related parts and limits the axial displacement of the vortex pump base.

2. According to claim 1, a novel vortex electronic water pump for a thermal management system of an electric vehicle is characterized in that: The numerical range of the center coordinates of the base flow channel trajectory series on the horizontal axis of the Cartesian plane rectangular coordinate system is set to 0.40 mm to 3.00 mm, and the numerical range on the vertical axis is set to 0.15 mm to 2.50 mm; the two overflow holes are located on the same side of the coolant inlet, and the two filter screens are respectively pressed into the filter screen installation cavities at two locations. The filter screen filters the larger impurities in the coolant and flows into the circular cavity of the vortex pump watertight jacket through the overflow hole and the overflow cavity, while discharging the air in the circular cavity of the vortex pump watertight jacket. The base choke groove is located above the base flow channel, and the geometric structure close to the coolant inlet side is set to a straight line shape, and the angle between the base choke groove and the horizontal axis of the Cartesian plane rectangular coordinate system is set to 80.0° (degrees) to 89.0° (degrees); the boss cylinder diameter of the base positioning boss one is set to 1.20 times the boss cylinder diameter of the base positioning boss two; the base anti-loosening pad is mounted on the outer cylindrical surface of the vortex pump base; the bearing chamber of the vortex pump base is interference fitted with the bearing two.

3. The novel vortex electronic water pump for electric vehicle thermal management system according to claim 1 is characterized in that: The blades of the vortex pump impeller and the shape of the blades close to the center of the impeller are set to be arc-shaped, the total number of blades on one side of the vortex pump impeller is set to range from 8 to 48, and the number of blades on both sides of the vortex pump impeller is set to be equal; the angle value of the impeller blade angular spacing 2 is set to 1.15 times the angle value of the impeller blade angular spacing 1, the impeller blade angular spacing 2 and the impeller blade angular spacing 1 are arranged adjacent to each other, and the impeller blade angular spacing 2 and the impeller blade angular spacing 1 are distributed along the circumferential array of the vortex pump impeller; the impeller blade stagger angle is set to the angle of relative angular displacement of the blades on both sides of the vortex pump impeller. The degree value range is 1.0° (degrees) to 3.0° (degrees); the length value range of the total length of the impeller blade is set to 0.30 times to 0.50 times the radius value of the vortex pump impeller, the length value range of the impeller blade extension section length is set to 0.70 times to 0.86 times the length value of the total length of the impeller blade, the height value range of the impeller blade extension section height is set to 1.00 mm to 5.00 mm, the length value range of the impeller blade straight section length is set to 0.72 times to 0.85 times the length value of the impeller blade extension section length, and the bottom contour of the impeller blade is set to an arc shape.

4. The novel vortex electronic water pump for electric vehicle thermal management system according to claim 1 is characterized in that: The first bearing is configured as a semi-ceramic deep groove ball bearing without a dustproof ring or an engineering plastic deep groove ball bearing without a dustproof ring, and the second bearing is configured as a semi-ceramic deep groove ball bearing with a half dustproof ring or an engineering plastic deep groove ball bearing with a half dustproof ring; because of its self-lubricating properties, it is particularly suitable for long-term operation when immersed in coolant.

5. The novel vortex electronic water pump for electric vehicle thermal management system according to claim 1 is characterized in that: The cavity cylindrical diameter of the limiting cavity one is set to 1.20 times the cavity cylindrical diameter of the limiting cavity two; a circular cavity is provided at the center position of the end surface of the vortex pump watertight sleeve, and the vortex pump base is assembled in the circular cavity provided at the center position of the end surface of the vortex pump watertight sleeve, the watertight sleeve positioning column one corresponds to the limiting groove of the motor housing, and the watertight sleeve positioning column two corresponds to another limiting groove provided in the motor housing, and the bottom of the inner circular cavity of the vortex pump watertight sleeve is provided with a bearing chamber slidably assembled with the bearing one, and the outer cylinder at the bottom of the vortex pump watertight sleeve is assembled in the bearing chamber provided at the bottom of the circular cavity of the motor housing; three small threaded holes are provided on the end face of the outer cylinder at the bottom of the vortex pump watertight sleeve.

6. The novel vortex electronic water pump for electric vehicle thermal management system according to claim 1 is characterized in that: The absolute value range of the coordinates of the center of the pump casing flow channel trajectory series on the horizontal axis of the Cartesian plane rectangular coordinate system 1 is set to 0.40 mm to 3.50 mm, and the value range on the vertical axis is set to 0.20 mm to 3.00 mm; the pump casing choke groove is located above the pump casing flow channel, and the geometric structure close to the pump casing inlet pipe side is set to a straight line shape, and the angle value of the pump casing choke groove angle and the horizontal axis of the Cartesian plane rectangular coordinate system 1 are set to 78.0° (degrees) to 88.0° (degrees); the angle of the pump casing inlet pipe and the horizontal axis of the Cartesian plane rectangular coordinate system 1 are set to 78.0° (degrees) to 89.0° (degrees); a circular ring groove is provided on the end face of the vortex pump casing, and the pump casing sealing ring is installed in the circular ring groove.

7. The novel vortex electronic water pump for electric vehicle thermal management system according to claim 1 is characterized in that: An elliptical annular rectangular groove is provided on the front end face of the motor housing, and the motor housing sealing ring is installed in the elliptical annular rectangular groove. Five threaded holes are also provided on the front end face of the motor housing, and four symmetrically distributed shock-absorbing pad mounting holes are provided at the bottom of the motor housing. The four shock-absorbing pad assemblies are installed in the four shock-absorbing pad mounting holes. The inner circular cavity of the motor housing is provided with two cavities arranged to the left with the central axis of the cavity as the center, and a threaded hole is respectively provided on the bottom plane of the two cavities.

8. The novel vortex electronic water pump for electric vehicle thermal management system according to claim 1 is characterized in that: The outer cylindrical surface of the stator core is provided with two bosses arranged symmetrically with the center axis of the outer cylindrical surface as the center, and each of the two bosses is provided with a threaded through hole; the number of tooth slots of the stator core is set to 6 slots or 9 slots, and the stator winding adopts a fractional slot concentrated winding design; one stator insert is inserted at each end of the stator core, and the inside of the stator insert is wound with a single-stack copper enameled wire, and the wire diameter specification of the copper enameled wire is 0.90 mm or 1.00 mm in diameter. The coil of the stator winding is connected by Δ (triangle) connection, and the three-phase power supply terminal wire of the stator winding is welded to the busbar terminal, and the stator core is pre-positioned by aligning the stator core limiting boss with the motor housing limiting slot. The stator core and its components are assembled in the circular cavity of the motor housing with transition fit, and then the stator core and its components are connected and fixed to the motor housing with two stator core fixing screws. The assembly joint surface between the stator core and the motor housing is coated with insulating thermal conductive silicone to improve the thermal conductivity and vibration resistance of the stator core and its components. The installation contact surface between the power connector and the motor housing is coated with sealant, and the power connector and the motor housing are tightened and fixed with four screws. The terminal connection wire of the power connector is also welded and fixed to the circuit board of the water pump motor controller. The rear cover and the motor housing are tightened and fixed with four screws, and the rear cover sealing gasket is pressed between the rear cover and the motor housing.

9. The novel vortex electronic water pump for electric vehicle thermal management system according to claim 1 is characterized in that: The base flow balancing groove and the pump housing flow balancing groove are used to collect larger particle impurities in the coolant inside the pump housing and solid impurities caused by friction and the like.

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